I would say, God did. He gave us the ability to choose between that which is correct, and that which is not - in other words, free will. Of course, it is up to us to do an effort and do the correct thing.
Jn:8:44: Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
Lk:10:18: And he said unto them, I beheld Satan as lightning fall from heaven.
Rv:12:7: And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
1Jn:3:4: Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
In other words,Satan was the inventor of Sin because he was the first to transgress the law.
Sin Sin Sin was created on 2006-05-22.
Sin After Sin was created on 1977-04-23.
Sin Is In was created in 2003.
Gone with the Sin was created in 2000.
Sin Killer was created in 2002.
Beautiful Sin was created in 2005.
Sin Fronteras was created in 2009.
Land of Sin was created in 1947.
Deeper Sin was created in 1998.
Black Sin was created in 1989.
Taste the Sin was created in 2009.
Sin Despertar was created in 2003.